CHANGEMENTS CLIMATIQUES ET ACTIVITES ANTHROPIQUES: IMPACTS SUR LES AQUIFERES COTIERS EN ALGERIE

Abstract

The status of Algerian coastal aquifers and recent developments affecting them, show that the large deficits observed (on the basis of the confrontation-resource needs) will widen increasingly; in addition to the effects of climate changes which are significantly felt with a rainfall deficit estimated at around 30%. Moreover, to the risk of exhaustion is superimposed a qualitative resource degradation, mainly the risk of seawater intrusion and anthropogenic pollution related to agricultural and industrial activities. To overcome this, an ambitious strategy was developed. It materialized by a set of projects and actions, especially the mobilization of non-conventional resources such as desalination of sea water (950 hm3 / year by 2030) and reuse of wastewater (where 251stations will produce 1200 hm3 / year in 2030). It nevertheless remains that a rigorous policy of demand management is needed, this through: (i) scientific development (monitoring, modeling, information systems and decision support), (ii ) adequate management based on financial mechanisms in order to avoid waste, (iii) sensitization and communication policy.